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you need to configure the launchpad to enable it's internal bank switching - else a "flashing" colour will just show the same as a solid one (one with the copy bit set) so send (via an out in traktor or something) CC000 on channel 1 with a value of 40 (0x28) to the launchpad. this only needs doing one time (unless you reset the launchpad or do some manual buffer switching via other CC's)

then you can just select colours the same as normal on the launchpad but subtract 4 from the value, which removes the copy bit and so only writes the colour to one internal launchpad buffer so that when it flips buffers it flashes

i.e: solid "hi red" is 7 so send it a value of 3 to make it a "flashing red"

the launchpad midi spec is pretty awesome tbh the only gotchas are that in flashing mode you really need to send a value of 4 to an led to turn it off instead of just 0 else it will turn a solid colour into a flashing one.

you need to configure the launchpad to enable it's internal bank switching - else a "flashing" colour will just show the same as a solid one (one with the copy bit set) so send (via an out in traktor or something) CC000 on channel 1 with a value of 40 (0x28) to the launchpad. this only needs doing one time (unless you reset the launchpad or do some manual buffer switching via other CC's)

then you can just select colours the same as normal on the launchpad but subtract 4 from the value, which removes the copy bit and so only writes the colour to one internal launchpad buffer so that when it flips buffers it flashes

i.e: solid "hi red" is 7 so send it a value of 3 to make it a "flashing red"

the launchpad midi spec is pretty awesome tbh the only gotchas are that in flashing mode you really need to send a value of 4 to an led to turn it off instead of just 0 else it will turn a solid colour into a flashing one.

the actual midi data that you need to send is 0xb0, 0x0, 0x28 which equates to CC 0 with a value of 40 on midi channel 1. in traktor speak that would be Ch01 > CC > 000 which it will then display as "Ch01.CC.000"

you then need to find some 'out' (if using traktor) that you can trigger and set the midi range max to 40 so that it sends out the right value.

i haven't tried to do anything like that just via traktor or ableton tho - i'm always using either midimasher or mixxx - both which can be scripted to send that out.

the actual midi data that you need to send is 0xb0, 0x0, 0x28 which equates to CC 0 with a value of 40 on midi channel 1. in traktor speak that would be Ch01 > CC > 000 which it will then display as "Ch01.CC.000"

you then need to find some 'out' (if using traktor) that you can trigger and set the midi range max to 40 so that it sends out the right value.

i haven't tried to do anything like that just via traktor or ableton tho - i'm always using either midimasher or mixxx - both which can be scripted to send that out.

K found it, BIG thanks to you my friend, big thanks.
Altough I don't know how to let a LED flash from zero to green?